Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Accounts receivable, allowance for doubtful accounts	$ 25	$ 21
Preferred stock, shares authorized	40,000,000	40,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares outstanding	11,554,282	762,590
Noncontrolling interest in consolidated partnership, redemption value	$ 1,726	$ 2,008
Series E Preferred Stock [Member]
Preferred stock, annual dividend rate	6.25%
Redeemable preferred stock, shares authorized	925,000
Redeemable preferred stock, par value	$ 0.01
Redeemable preferred stock, shares outstanding	925,000
Redeemable preferred stock, liquidation preference	$ 9,250
Series D Preferred Stock [Member]
Preferred stock, annual dividend rate		6.25%
Preferred stock, shares authorized		6,700,000
Preferred stock, par value		$ 0.01
Preferred stock, shares outstanding		6,245,156
Preferred stock, liquidation preference		$ 63,427